Its been raining a lot this year and its created a big tick problem. I have a puppy that goes out and comes back with some every time which I pick off immediately. I have treated them and have been removing as many as i can. He just came in with something on his head that looked like dirt but when I brushed it off, it was stuck to him. Are these tick eggs? I treated him for ticks and Im unsure what to do. Should I wash him, let the medication work or what? What do tick eggs look like?